Tags: Motorcycle.
The Harley-Davidson Model 7D of 1911 was the first successful v-twin from Harley-Davidson inaugurating a motorcycle engine configuration that has continued unbroken from the Milwaukee motor company ever since. In 1909 Harley had made a few examples (27 units) of another v-twin but the design was flawed and they did not try again until two years later. In 1911 5625 Model 7Ds were manufactured. The Model 7D’s motor was the F-head IOE engine in use until 1929.
